Improvement in piston-rod packings



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JAMES` n. BLEsslNe, or ALBANY, NEWronK, As'srcNvon ro nIMsELE AND FREDERICK fr'ovvnsEnD,I or SAME rLAcE. e

lMPRCVEMENT-IN PISTON-ROD PACKINGS.

The Schedule referred to in these Letters Patent and making part o1' the same To all whom it may concern:

Be it known. that I, JAMES H. BLnssINe, of Albany, in the county of Albany and State ot' New York, have invented a new and improved Packing; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying dram'ng making part of this specification,- in whichl Figure 1 is an end view of the cap orl head of a steam-cylinder having my invention applied to its stuffing-box.- i

Figure 2 is a diametrical section through fig. 1, eX- posing the packing in its chamber.

Figure 3 is an external view of the cut rings and a section through the elastic covering.

Figure 4` is an end view 'of the packing.

Figure 5 is a diainetrical section through the out rings.

Similar letters of reference indicate corresponding parts in the'several gures.

First. '-.The nature of my invention consists in a vulcanized rubber cylinder made long enough to be compressed endwise and applied around split metallic rings, which form a cylinder shorter than the rubber cylinder, in4 combination with a steam-admitting stuf ling-box 01 other chamber and a compression-gland of said chamber, all in such manner that the metallic packin g-rin gs are inclosed and held together, theA joints at the ends of the cylinder of metallic packing made steam-tight by -endwise compression of the rubber cylinders, and the contact of the packing with the piston-rod maintained by pressure ofsteam upon the outer' circumference of the rubber cylinder.

Second. lt consists in having the inner surface 'of the above-mentioned metallic-packing cylinder so con structed that -the steam, entering directly from thel cylinder, between the packing and thel piston-rod, will enter concentric channels ofthe respective sections of packing by means ofintersecting cross-channels, which are arranged to break-j oints. l

In carrying out my invention for a piston-rod packing I use plain oyliudricrings of brass or other proper material, cut through at one point of their; rim, 'and having their edges chamfered and their inner surfaces conceutrioally grooved or channeled, such channels being --intersected by the cuts or splits of' the rings, and all of the rings except the outer being grooved and oham'fered. The grooved and not grooved rings I bind together 4by the vulcanized rubber cylinder.

To enable others skilled in the art to understand my invention, I will explain its construction and operation.

In the accompanying drawmgf- A represents-a cylinder-head, on the external surface of which a chambered extension, B, is formed, which is provided with a cap, G.

W'ithin the said cbarnbered extension, and encircling the piston-rod D, is an India-rubber sleeve, G,

' eter than the .diameter of the chamber containing it,

for the purpose of admitting 'steam to this chamber from the steam-cylinder through an aperture, a, shown in tig. 2. Steam thus admittedwill operate to compress the elastic sleeve about its cutrings.

' There are four rings, b b b b', represented in the drawing, igs. 2,13, 4;, and 5, but, ifdesirable, a greater or lesser number may be employed, according to circumstances.

. The rings are all cut as shown in figs. 3, 4, and 5. The ringV b, which is next to the cap C, is plain interiorly, thatis to say, it hasno grooves in its interior surface. The next ring b' isgrooved interiorly and chamfered on that edge opposite the ring l), but is not hamfered on that edge which abuts against this ring b. The otherl two ringsb .b' are grooved interiorlyand Vchamfered on -both edges. l v

It will be seen that the rings b b b are grooved and chamfered in snchmaunerthat steam which enters 4the grooves in the first ring, or that which isnext they cylinder-head, will pass from the grooves to cutsin the several ringsI until it reaches the last ring b, where it will be checked.

It should vhe understood vthat the splits or cuts of the rings all break' joints with each other, so that the steam must circulate from a cut in one ring -to ,a groove in an adjacent ring, and nice versa.

There will thus be a lm of steam between y,the pistourod and the packing, which will operate as a perfect lubricator and preventv undue friction between the opposed surfaces. A

The object of vthe elastic sleeve G is to lhold the rings in place and at the same time to prevent leak age and to compass the rings about the piston-rod D, so that any wear orzinequalities will becompensated for.

Inaddition tothe compressionexercised bythe sleeve the steam which is allowed -to act upon it externally Will cause it to hug the rings` closely and keep their internal surfaces in close contact with the piston-rod D.

It will be seen that the thread of steam following the piston-rod strikes the chamfered edge of ring b'. and runs around to the split or slot, and entering, lls the remaining grooves of that ring and the groove 'formed by its upper chamferedl edge and the chamfered edge ofthe adjoining rings b'. passes Ato the slot of said ring b', and in like manner fills its grooves and passes on to the next adjoining ring b', where, after filling its groove, it is stopped by `reason of the upper edge of this ring not being chamfered and being placed in juxtaposition with the ring b, which is not grooved noichamfered. 4

l have represented my invention applied to pistonrods, but it is obvious that it is applicableV as a packing to rods of water as well as steam-engines or machines, and therefore I do not confine myself to steamengine piston-rods.

Havingdeserbed my invention,

What I claim as new, and desire to secure by Letters Patent, isy v I l. The combination of the vulcanized rubber cylinder G, made long enough to be compressed endwise, in combination with the chamber B, compressible metallic sectional packing-cylinder b b b' b', gland C c,

The steam thenand steam inlet-passage' a, all substantially in the manner and for the purpose herein described.

2.4 The channels formed onV the compressible sectional packing-cylinder b'b with the chamf'ered edges,

in the manner and for the purpose herein described.

o.4 fThe combination of4 the steam-channels and c hamfered edges of the packing-.rings withthe interseeting splits of said lings, said intersecting splits being arranged to break-joints, substantially in the man ner described and for the purpose set forth.

4. The combination of the split ring b, which is notl Witnesses:

A. P. STUART, -v PETER G. GALLEN. 

